What does one do if he was fasting one day and breaking his fast the next, and his day of breaking the fast coincided with the Day of 'Ashura or the Day of 'Arafah?

Question:
May Allah reward you, Honorable Shaykh. He says: If a person was fasting one day and breaking his fast the next, and his day of breaking the fast coincided with the Day of 'Arafah, the Day of 'Ashura, or the white days, is it better for him to fast them, or should he continue with what he is doing, fasting one day and breaking the fast the next? And what is the best regarding fasting?

Answer:
He should fast the fasting that is specified in the texts. Fasting one day and breaking the fast the next is for days other than those for which fasting is specified. He should fast three days of every month, fast Monday and Thursday of every week, fast the Day of 'Arafah, fast the Day of 'Ashura, fast the ten days of Dhul-Hijjah, and fast the days that are specified. Whatever exceeds these days, he should fast one day and break the fast the next for the rest of his life. Thus, he maintains the specified fasting and adds to it, in the remainder, the recommended practice of fasting one day and breaking the fast the next.